X39 - Exposure to other forces of nature
X39.0 - Exposure to natural radiation
Excludes 1:
-contact with and (suspected) exposure to radon and other naturally occuring radiation Z77.122)
-exposure to man-made radiation (W88-W90)
-exposure to sunlight (X32)
X39.01 - Exposure to radon
X39.08 - Exposure to other natural radiation